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Jason Giambi Signed Oakland Pose 1 Baseball 8x10 Photo (JSA) NBA Our authentic signed Trevon DiggsThis photograph has been personally hand signed by Jason Giambi and authenticated by a top 3rd party authentication company. All autographed collectibles are limited! Order now to add this timeless piece of baseball memorabilia to your collection before its gone. A baseball photo autographed by Jason Giambi and authenticated by JSA Includes a tamper proof authenticity sticker from JSA 90 day Satisfaction Guarantee: if you are not completely satisfied